Quad-Helix Appliances for crossbite correction.
Chumak
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D002648:Child; D003768:Dental Occlusion, Centric; D005260:Female; D006801:Humans; D007180:Incisor; D008297:Male; D008310:Malocclusion / Q000628:therapy*; D008437:Maxilla; D016382:Orthodontic Appliance Design; D009967:Orthodontic Appliances; D010155:Palatal Expansion Technique / Q000295:instrumentation*